Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display device, comprising: an organic light-emitting diode display panel, a fingerprint recognition layer located below the organic light-emitting diode display panel, and a light filtering layer located between the organic light-emitting diode display panel and the fingerprint recognition layer, wherein: the light filtering layer is configured to filter out light rays with an incidence angle greater than a filter angle among light rays carrying fingerprint line information, and to transmit light rays with an incidence angle smaller than or equal to the filter angle, wherein the filter angle is an angle between the light rays carrying fingerprint line information and a direction perpendicular to the fingerprint recognition layer; and the light filtering layer comprises a plurality of filtering structures arranged in an array, a shape of a section of the plurality of filtering structures in a direction from the fingerprint recognition layer to the organic light-emitting diode display panel is an inverted trapezium, surfaces on left and right sides of the inverted trapezium facing the plurality of filtering structures are reflecting faces, and an angle complementary to an angle between each of the reflecting faces and the direction perpendicular to the fingerprint recognition layer is a sharp angle.
Display technology and fingerprint sensing. This invention addresses the challenge of integrating fingerprint recognition below an organic light-emitting diode (OLED) display without interfering with display performance or fingerprint image quality. The display device includes an OLED display panel and a fingerprint recognition layer positioned beneath it. A light filtering layer is situated between these two layers. This light filtering layer is specifically designed to manage light carrying fingerprint line information. It selectively filters out light rays incident at an angle greater than a defined filter angle, while allowing rays at an angle less than or equal to the filter angle to pass through. The filter angle is defined relative to the direction perpendicular to the fingerprint recognition layer. The light filtering layer itself is constructed from an array of filtering structures. The cross-section of these structures, when viewed from the fingerprint recognition layer towards the OLED panel, takes the shape of an inverted trapezium. The surfaces on the sides of this inverted trapezium, facing adjacent filtering structures, are reflective. The angle formed between each of these reflective surfaces and the direction perpendicular to the fingerprint recognition layer is a sharp angle, with the complementary angle being the sharp angle.
2. The display device according to claim 1 , wherein the light filtering layer comprises a plurality of filtering structures arranged in an array; a shape of a section of a gap between two adjacent filtering structures in a direction from the fingerprint recognition layer to the organic light-emitting diode display panel is an inverted trapezium; and a shape of a section of the plurality of filtering structures in the direction from the fingerprint recognition layer to the organic light-emitting diode display panel is a triangle, and surfaces on left and right sides of the triangle facing the plurality of filtering structures are reflecting faces with a sharp angle from the direction perpendicular to the fingerprint recognition layer.
3. The display device according to claim 2 , wherein the filter angle is determined according to a height of the inverted trapezium, a width of a bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, and the sharp angle.
4. The display device according to claim 3 , wherein given the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, and the sharp angle, the filter angle is inversely proportionate to the height of the inverted trapezium.
A display device incorporates an organic light-emitting diode (OLED) display panel with a filter structure designed to improve viewing angles and reduce ambient light reflections. The filter structure includes an inverted trapezium-shaped element positioned proximate to the OLED panel. The inverted trapezium has a bottom side adjacent to the display panel and a top side opposite the panel, with the width of the bottom side and the sharp angle of the trapezium influencing the filter's performance. The filter angle, which determines the directionality of light transmission, is inversely proportional to the height of the inverted trapezium. This relationship ensures that as the height of the trapezium increases, the filter angle decreases, optimizing light control and enhancing display visibility under varying lighting conditions. The design minimizes glare and improves contrast by selectively filtering ambient light while preserving the brightness and clarity of the OLED panel's emitted light. The filter structure may be integrated into the display panel or positioned as a separate layer to enhance optical performance. This configuration is particularly useful in high-ambient-light environments, such as outdoor displays or bright indoor settings, where maintaining image quality is critical.
5. The display device according to claim 3 , wherein given the height of the inverted trapezium, and the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, the filter angle is inversely proportionate to the sharp angle.
A display device incorporates an optical filter with an inverted trapezium-shaped structure positioned over an organic light-emitting diode (OLED) display panel. The filter is designed to improve viewing angles and reduce ambient light reflection. The inverted trapezium has a height and a bottom width adjacent to the OLED panel. The filter angle, which determines the light transmission direction, is inversely proportional to the sharp angle of the trapezium. This relationship ensures optimal light control, enhancing display visibility under varying lighting conditions. The filter's geometry is engineered to balance light transmission efficiency and reflection suppression, addressing issues like glare and color distortion in OLED displays. The design allows for precise tuning of optical properties by adjusting the trapezium's dimensions, providing flexibility in optimizing performance for different display applications. The filter's structure and angle relationships contribute to improved contrast and color accuracy, addressing common challenges in OLED display technology.
6. The display device according to claim 3 , wherein given the height of the inverted trapezium, and the sharp angle, the filter angle is proportionate to the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel.
7. The display device according to claim 2 , wherein the reflecting faces are mirrors.
A display device is designed to enhance image quality by reducing light scattering and improving contrast. The device includes a light source, a light modulator, and a projection system that directs light onto a screen. The light modulator controls the intensity and direction of light to form an image. The projection system includes reflecting faces that redirect the modulated light toward the screen. In this configuration, the reflecting faces are mirrors, which provide high reflectivity and precise light redirection. Mirrors are used to ensure that the light path is accurately controlled, minimizing losses and maintaining image clarity. The use of mirrors in the projection system allows for efficient light transmission, reducing distortion and improving the overall visual quality of the displayed image. This design is particularly useful in high-contrast applications where precise light control is essential. The mirrors may be flat or curved, depending on the specific optical requirements of the display system. The device may also include additional optical elements, such as lenses or filters, to further refine the light path and enhance image performance. The overall system is optimized for applications requiring sharp, high-contrast visuals, such as professional displays or high-end consumer electronics.
8. The display device according to claim 2 , wherein the light filtering layer and the fingerprint recognition layer are structured integrally.
9. The display device according to claim 1 , wherein the filter angle is determined according to a height of the inverted trapezium, a width of a bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, and the sharp angle.
A display device includes an organic light-emitting diode (OLED) display panel and a light-blocking structure positioned above the display panel. The light-blocking structure has an inverted trapezium shape with a filter angle that controls light transmission. The filter angle is determined based on the height of the inverted trapezium, the width of the bottom side of the inverted trapezium closest to the OLED display panel, and the sharp angle of the trapezium. This configuration helps reduce light leakage and improve display contrast by precisely controlling the light-blocking properties of the structure. The inverted trapezium shape allows for efficient light blocking while maintaining a compact design. The filter angle is adjusted to optimize light transmission characteristics, ensuring that unwanted light is effectively blocked while preserving the desired display performance. This design is particularly useful in high-resolution OLED displays where minimizing light leakage is critical for image quality. The light-blocking structure may be integrated into the display panel or positioned as a separate layer above it, depending on the specific application requirements. The overall design enhances display performance by improving contrast and reducing unwanted light interference.
10. The display device according to claim 9 , wherein given the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, and the sharp angle, the filter angle is inversely proportionate to the height of the inverted trapezium.
11. The display device according to claim 9 , wherein given the height of the inverted trapezium, and the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel, the filter angle is inversely proportionate to the sharp angle.
A display device incorporates an optical filter positioned between a light source and an organic light-emitting diode (OLED) display panel. The filter is designed to reduce ambient light reflection and improve display visibility. The filter has an inverted trapezium cross-sectional shape, where the height of the trapezium and the width of its bottom side (adjacent to the OLED panel) influence the filter's optical properties. Specifically, the filter angle, which affects light transmission and reflection, is inversely proportional to the sharp angle of the trapezium. This relationship ensures optimal light management by balancing reflection reduction and light transmission efficiency. The filter's structure minimizes glare while maintaining high display brightness, enhancing visibility in bright environments. The design is particularly useful for OLED displays, where minimizing ambient light interference is critical for image quality. The filter's geometric parameters are tuned to achieve the desired optical performance, ensuring a balance between sharpness and light transmission. This configuration improves contrast and color accuracy in various lighting conditions.
12. The display device according to claim 9 , wherein given the height of the inverted trapezium, and the sharp angle, the filter angle is proportionate to the width of the bottom side of the inverted trapezium proximate to the organic light-emitting diode display panel.
13. The display device according to claim 1 , wherein the reflecting faces are mirrors.
14. The display device according to claim 1 , further comprises a light transmitting layer located between the organic light-emitting diode display panel and the light filtering layer; and the light transmitting layer and the light filtering layer are structured integrally.
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March 23, 2021
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